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localeconv

  • Bài viết

Gets detailed information on locale settings.

Syntax

struct lconv *localeconv( void );

Return value

localeconv returns a pointer to a filled-in object of type struct lconv. The values contained in the object are copied from the locale settings in thread-local storage, and can be overwritten by subsequent calls to localeconv. Changes made to the values in this object don't modify the locale settings. Calls to setlocale with category values of LC_ALL, LC_MONETARY, or LC_NUMERIC overwrite the contents of the structure.

Remarks

The localeconv function gets detailed information about numeric formatting for the current locale. This information is stored in a structure of type lconv. The lconv structure, defined in LOCALE.H, contains the following members:

Field Meaning
decimal_point,
_W_decimal_point		 Pointer to decimal-point character for nonmonetary quantities.
thousands_sep,
_W_thousands_sep		 Pointer to character that separates groups of digits to left of decimal point for nonmonetary quantities.
grouping Pointer to a char-sized integer that contains the size of each group of digits in nonmonetary quantities.
int_curr_symbol,
_W_int_curr_symbol		 Pointer to international currency symbol for current locale. First three characters specify alphabetic international currency symbol as defined in the ISO 4217 Codes for the Representation of Currency and Funds standard. Fourth character (immediately preceding null character) separates international currency symbol from monetary quantity.
currency_symbol,
_W_currency_symbol		 Pointer to local currency symbol for current locale.
mon_decimal_point,
_W_mon_decimal_point		 Pointer to decimal-point character for monetary quantities.
mon_thousands_sep,
_W_mon_thousands_sep		 Pointer to separator for groups of digits to left of decimal place in monetary quantities.
mon_grouping Pointer to a char-sized integer that contains the size of each group of digits in monetary quantities.
positive_sign,
_W_positive_sign		 String denoting sign for nonnegative monetary quantities.
negative_sign,
_W_negative_sign		 String denoting sign for negative monetary quantities.
int_frac_digits Number of digits to right of decimal point in internationally formatted monetary quantities.
frac_digits Number of digits to right of decimal point in formatted monetary quantities.
p_cs_precedes Set to 1 if currency symbol precedes value for nonnegative formatted monetary quantity. Set to 0 if symbol follows value.
p_sep_by_space Set to 1 if currency symbol is separated by space from value for nonnegative formatted monetary quantity. Set to 0 if there's no space separation.
n_cs_precedes Set to 1 if currency symbol precedes value for negative formatted monetary quantity. Set to 0 if symbol succeeds value.
n_sep_by_space Set to 1 if currency symbol is separated by space from value for negative formatted monetary quantity. Set to 0 if there's no space separation.
p_sign_posn In nonnegative formatted monetary quantities, position of the positive sign.
n_sign_posn In negative formatted monetary quantities, position of the positive sign.

Except as specified, members of the lconv structure that have char * and wchar_t * versions are pointers to strings. Any member that equals "" (or L"" for wchar_t *) is either of zero length, or not supported in the current locale. Both decimal_point and _W_decimal_point are always supported and have a nonzero length.

The char members of the structure are small non-negative numbers, not characters. Any member that equals CHAR_MAX isn't supported in the current locale.

The values of grouping and mon_grouping are interpreted according to the following rules:

  • CHAR_MAX - Don't perform any further grouping.

  • 0 - Use previous element for each of remaining digits.

  • n - Number of digits that make up current group. Next element is examined to determine size of next group of digits before current group.

The values for int_curr_symbol are interpreted according to the following rules:

  • The first three characters specify the alphabetic international currency symbol as defined in the ISO 4217 Codes for the Representation of Currency and Funds standard.

  • The fourth character (immediately preceding the null character) separates the international currency symbol from the monetary quantity.

The values for p_cs_precedes and n_cs_precedes are interpreted according to the following rules (the n_cs_precedes rule is in parentheses):

  • 0 - Currency symbol follows value for nonnegative (negative) formatted monetary value.

  • 1 - Currency symbol precedes value for nonnegative (negative) formatted monetary value.

The values for p_sep_by_space and n_sep_by_space are interpreted according to the following rules (the n_sep_by_space rule is in parentheses):

  • 0 - Currency symbol is separated from value by space for nonnegative (negative) formatted monetary value.

  • 1 - There's no space separation between currency symbol and value for nonnegative (negative) formatted monetary value.

The values for p_sign_posn and n_sign_posn are interpreted according to the following rules:

  • 0 - Parentheses surround quantity and currency symbol.

  • 1 - Sign string precedes quantity and currency symbol.

  • 2 - Sign string follows quantity and currency symbol.

  • 3 - Sign string immediately precedes currency symbol.

  • 4 - Sign string immediately follows currency symbol.

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

Requirements

Routine Required header
localeconv <locale.h>

For more compatibility information, see Compatibility.

Libraries

All versions of the C run-time libraries.

See also

Locale
setlocale
strcoll functions
strftime, wcsftime, _strftime_l, _wcsftime_l
strxfrm, wcsxfrm, _strxfrm_l, _wcsxfrm_l